The Deputy Prime Minister says he's committed to building more dams in Australia, but is not sure the Needles Gap dam proposed in central west New South Wales will make the shortlist.

Warren Truss is meeting with local mayors in Bathurst today to discuss how the Federal Government can assist employment growth.

He says about 100 proposed dams are being investigated by a working group to decide which ones will be progressed.

"There are many projects that seemed a good idea and had a lot going for them that have fallen over during that investigative process, so everyone wants any investment that's made to be a success, but there must be committed users," he said.

"There's no point in building a dam and filling it with water unless there are really people who are committed to actually using it and so all of that has to be put together in an economic package to make sure that the investment is worthwhile."